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In the world of Bitcoin, the Bitcoin address (in a format similar to this: 1JwSubhmg6iPtRjtyqhUYH7bZg3Lfy1T) is equivalent to a bank account number, and the Bitcoin private key (in a similar format: 5KJvs) ng HeMpm884wtkJNZQGaCErckh HJBGFsvd3VyK5qMZXj3hS) is equivalent to the password to open this account, an address (account number) corresponds to a private key (password). Only know the Bitcoin address can not know the bitcoin private key, but also can not use the bitcoin inside, this is the same as you know someone else's bank account number but do not know someone else's account password can not withdraw money and transfer. But what is different from a bank is that knowing the bitcoin private key can tell its Bitcoin address and can transfer bitcoins under that address, which means that obtaining the bitcoin private key has full control of the private key and bitcoin under the address - the private key is everything! So if 1: You lose your Bitcoin private key, or 2: Your Bitcoin private key is known to others, and the Bitcoin under your address is over: either you can never use the bitcoin on the address or you are transferred by someone who knows your private key.

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Users of Bitcoin wallet Electrum are currently facing a phishing attack, according to the Devi Security Lab. Hackers broadcast messages to electrum clients through a malicious server, prompting the user to update to v4.0.0, and if the user follows the prompt to install the backdoor-carrying client, the private key is stolen and all digital assets are stolen. At the time of writing, at least 1,450 BTCs worth approximately $11.6 million had been stolen from phishing attacks that forged Electrum upgrade alerts. Devi Security Labs hereby suggests that versions of Electrum below 3.3.4 are vulnerable to such phishing attacks, and users using Electrum Wallet are requested to update to the latest version of Electrum3.3.8 via the official website (electrum.org), which has not yet been officially released v4.0.0, and do not use the link in the prompt message to avoid asset losses.

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Electrum wallets have been hacked in recent days and nearly 250 bitcoins have been stolen, according to blockchain security team Devi Security Labs. This attack, confirmed by Electrum, involves creating a fake version of the wallet to trick users into providing password information. Electrum responded on Twitter that "this is an ongoing phishing attack on Electrum users and advised users to download wallet apps from the official website." Mars Finance reminds users not to install electrum wallets from unknown sources.

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The UB team has now developed Core, Core-QT, Electrum Wallet (where Electrum is a lightweight wallet that supports multiple signatures) and released a complete blockchain browser. More than 18 trading platforms around the world support UBTC trading.